In September I was gifted a copy of Sunkenland by a friend.  The game had only just come out, but it instantly went down well. According to the Steam store page, "Sunkenland is an exciting post-apocalyptic survival and exploration game set in the near future when water covered most of the Earth. Explore sunken cities, scavenge resources and valuable technologies, build your base, trade, fight and survive." It is still very early access of course (its only been out a month) but this game...